Fig 4.
Atomic force micrographs of E. coli and S. aureus cell surface before and after inactivation with 0.028 mg mL-1 of Cu/Zn NPs, at pH 6 and after 60 min; a) untreated E. coli; b) treated E. coli; c) untreated S. aureus; e) treated S. aureus.
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